Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

Dictionary Suite



flu ihd
parts of speech:
noun, adjective
Word Combinations (noun, adjective), Language Note, Word Explorer, Word Parts
part of speech: noun
definition: a substance, such as a liquid or gas, that can flow and that tends to conform to the shape of its container.
When its temperature rises above thirty-two degrees Fahrenheit, water becomes a fluid.The doctor told her to rest and drink fluids.
similar words:
gas, liquid, water
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part of speech: adjective
definition 1: of, pertaining to, or resembling a fluid.
When butter melts, it becomes fluid.
similar words:
fluent, gaseous, liquid, watery
definition 2: not stable; changeable.
They have a fluid approach to problem solving.
adaptable, flexible, fluctuating, unsettled, unstable, unsteady, variable
similar words:
adjustable, changeable, floating, mobile, mutable, protean, volatile
definition 3: smooth and graceful.
This dance calls for fluid movements.
fluent, graceful, liquid
similar words:
sinuous, undulant
definition 4: easily converted to cash; liquid.
The company is keeping its assets fluid.
similar words:
available, convertible
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derivations: fluidly (adv.), fluidity (n.), fluidness (n.)
Language Note
Liquid and fluid are close in meaning, but they are not synonyms. Both words refer to a state of matter. A liquid is matter in a form that flows easily and is neither a solid nor a gas.

Milk and blood are liquids. Mercury is the only metal that is a liquid at room temperature.

A fluid is matter in a form that flows easily and is not a solid.

Water and air are fluids.
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